Availability for kid's size tires is somewhat limited. The price was right, grip compared to a more knobby tire was my main concern but they seem alright on a variety of surfaces ranging from pavement, hard packed path to grass. After one season they've held up reasonably well to my son's full lock braking/skids and will provide plenty of life for the bike's next owner. This is a great way to extend the life of an older bike or provide a smoother ride for newer ones.